CN113246802A - Control method and device of high-voltage system, electronic equipment and storage medium - Google Patents
Control method and device of high-voltage system, electronic equipment and storage medium Download PDFInfo
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- CN113246802A CN113246802A CN202110684468.7A CN202110684468A CN113246802A CN 113246802 A CN113246802 A CN 113246802A CN 202110684468 A CN202110684468 A CN 202110684468A CN 113246802 A CN113246802 A CN 113246802A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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- Mechanical Engineering (AREA)
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Abstract
The application provides a control method and device of a high-voltage system, electronic equipment and a storage medium, wherein in the control method of the high-voltage system, when a power-on command is received, a voltage converter is controlled to supply power to a target part. And then detecting whether the voltage of the stack is greater than the voltage of the voltage converter. And if the voltage of the electric pile is detected to be larger than the voltage of the voltage converter, stopping the power supply of the voltage converter to the target part, and switching the electric pile to supply power to the target part. And when a power-off command is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode. And detecting whether the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value. And if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop. And when the discharge of the galvanic pile is finished, controlling the voltage converter to stop.
Description
Technical Field
The present disclosure relates to the field of system control technologies, and in particular, to a method and an apparatus for controlling a high voltage system, an electronic device, and a storage medium.
Background
With the development of science and technology, fuel cell vehicles gradually enter the public vision, and mainly use hydrogen as fuel and use the electrochemical reaction of hydrogen and oxygen to generate electricity as a power source. The stack in a fuel cell vehicle is formed by stacking a plurality of fuel cells in series. The fuel cell stack is a site where electrochemical reaction occurs and is a core part of a fuel cell system.
The high-voltage system of the existing fuel cell engine is simple in design, high-voltage parts supply power through various forms of power taking, essentially, the power is directly taken from the high-voltage system of the whole vehicle, in the working process of the fuel cell engine, the power of the high-voltage system is from the output of a DC/DC (DC-DC converter) converter in the fuel cell engine, the power consumption of the high-voltage parts in the fuel cell engine is high, but the working efficiency of the DC/DC converter is not high, so that the energy utilization rate of the whole high-voltage system is low.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for controlling a high voltage system, an electronic device, and a storage medium, so as to solve the problem that the energy utilization rate of the whole high voltage system is low due to the low operating efficiency of the DC/DC converter in the fuel cell engine in the prior art.
In order to achieve the above purpose, the present application provides the following technical solutions:
the application discloses in a first aspect a control method for a high voltage system, which is applied to a fuel cell vehicle controller in the high voltage system, wherein a stack in the high voltage system is connected with a high voltage part in the high voltage system, and the method comprises the following steps:
when a power-on instruction is received, the voltage converter is controlled to supply power to the target part;
detecting whether the voltage of the electric pile is greater than the voltage of the voltage converter;
if the voltage of the electric pile is detected to be larger than the voltage of the voltage converter, stopping the voltage converter from supplying power to the target part, and switching the electric pile to supply power to the target part;
when a power-off instruction is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode;
detecting whether the difference value of the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value or not;
if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop;
and when the discharge of the galvanic pile is finished, controlling the voltage converter to stop.
Optionally, in the method, the controlling the voltage converter to supply power to the target component includes:
detecting whether the voltage converter is normal;
if the voltage converter is detected to be normal, starting the voltage converter;
controlling the voltage converter to pre-charge the target component;
detecting whether the target part is pre-charged;
and if the target part is detected to be precharged, controlling the voltage converter to supply power to the target part.
Optionally, in the above method, before stopping the power supply of the voltage converter to the target component and switching the cell stack to supply the power to the target component, the method further includes:
and detecting the stability of the voltage output of the galvanic pile.
Optionally, in the method, if it is detected that a difference between the voltage of the stack and the voltage of the voltage converter is smaller than a preset threshold, controlling the target component to complete shutdown includes:
if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, acquiring the current state of the target part;
judging whether the current state of the target part meets the condition of entering a shutdown state or not;
and if the current state of the target part is judged to be in accordance with the condition of entering the shutdown state, controlling the target part to be shut down.
The present application discloses in a second aspect a control device for a high voltage system, comprising:
the power supply unit is used for controlling the voltage converter to supply power to the target part when receiving a power-on instruction;
a first detection unit for detecting whether a voltage of the stack is greater than a voltage of the voltage converter;
a switching unit configured to stop the voltage converter from supplying power to the target component and switch the cell stack to supply power to the target component if it is detected that the voltage of the cell stack is greater than the voltage of the voltage converter;
the first control unit is used for controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode when a power-off instruction is received;
a second detection unit for detecting whether a difference between the voltage of the stack and the voltage of the voltage converter is less than a preset threshold;
the second control unit is used for controlling the target part to stop if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value;
and the third control unit is used for controlling the voltage converter to stop when the discharge of the galvanic pile is finished.
Optionally, in the above apparatus, the power supply unit includes:
the first detection subunit is used for detecting whether the voltage converter is normal or not;
a start-up unit for starting up the voltage converter if it is detected that the voltage converter is normal;
the first control subunit is used for controlling the voltage converter to pre-charge the target part;
the second detection subunit is used for detecting whether the target part is precharged;
and the second control subunit is used for controlling the voltage converter to supply power to the target part if the target part is detected to be precharged.
Optionally, the above apparatus further includes:
and the third detection unit is used for detecting the stability of the voltage output of the galvanic pile.
Optionally, in the above apparatus, the second control unit includes:
the obtaining subunit is configured to obtain a current state of the target component if it is detected that a difference between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold;
the judging subunit is used for judging whether the current state of the target part meets the condition of entering a shutdown state;
and the third control subunit is used for controlling the target part to stop if the current state of the target part is judged to meet the condition of entering the stop state.
A third aspect of the present application discloses an electronic device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of the first aspects of the present application.
A fourth aspect of the present application discloses a computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method according to any of the first aspects of the present application.
According to the technical scheme, in the control method of the high-voltage system, when the power-on command is received, the voltage converter is controlled to supply power to the target part. And then detecting whether the voltage of the stack is greater than the voltage of the voltage converter. And if the voltage of the electric pile is detected to be larger than the voltage of the voltage converter, stopping the power supply of the voltage converter to the target part, and switching the electric pile to supply power to the target part. And when a power-off command is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode. And detecting whether the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value. And if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop. And when the discharge of the galvanic pile is finished, controlling the voltage converter to stop. Therefore, by the method, the high-voltage parts are firstly supplied with power through the voltage converter, and when the voltage of the galvanic pile is greater than the voltage of the voltage converter, the galvanic pile is used for directly supplying power to the high-voltage parts, so that the electric energy conversion process of the galvanic pile is reduced, and the energy utilization efficiency is greatly improved. Meanwhile, the method realizes that the high-voltage parts of the fuel cell engine are controlled by two power supplies on the premise of ensuring the stability of the system, and can ensure the normal stop of the fuel cell engine under the condition of the fault of the whole vehicle high-voltage system. The problem of low energy utilization ratio of the whole high-voltage system caused by low working efficiency of the DC/DC converter of the fuel cell engine in the technology is solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of an engine high pressure system architecture disclosed in an embodiment of the present application;
FIG. 2 is a flow chart of a method of controlling a high pressure system as disclosed in another embodiment of the present application;
FIG. 3 is a flowchart of one implementation of step S201 disclosed in another embodiment of the present application;
FIG. 4 is a schematic diagram of a control device for a high voltage system as disclosed in another embodiment of the present application;
fig. 5 is a schematic diagram of an electronic device according to another embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Moreover, in this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
It can be known from the background art that the high-voltage system of the existing fuel cell engine is relatively simple in design, the power supply of high-voltage components is realized in various forms, and the electricity is essentially directly obtained from the high-voltage system of the whole vehicle.
In view of this, the present application provides a method and an apparatus for controlling a high voltage system, an electronic device, and a storage medium, so as to solve the problem that the energy utilization rate of the whole high voltage system is low due to the low operating efficiency of the DC/DC converter in the fuel cell engine in the prior art.
Firstly, the high-voltage system of the high-power fuel cell engine is designed, and the control of the whole system is described. The application high-power fuel cell engine pile operating voltage higher, can satisfy the high-pressure demand of general automobile-used high-pressure spare part, high-pressure system's framework is shown as figure 1, the pile is the main energy generator of fuel cell engine, CT is current detection device, VT is voltage detection device, K1, K2, K3, K4, K5, K6 is high-voltage contactor, D1, D2 is the diode, DC/DC converter is used for realizing that 24V low-voltage electricity converts the required high-voltage electricity of high-pressure spare part into, this voltage is in the operating voltage scope of pile, the air compressor machine, the hydrogen circulating pump, electric water pump, the PTC heater is key high-pressure spare part. The electric pile is connected with high-voltage parts of each high-voltage system through K1 and K2 and is connected with a whole vehicle interface through K6, an anti-reverse diode D1 is arranged behind the K1, and the anti-reverse diode D1 is mainly used for preventing external high voltage from reversely flowing to the electric pile when the electric pile is connected into the high-voltage system, so that the electric pile is damaged. The DC/DC converter is connected with each high-voltage part of a high-voltage system through K3 and K4, a reverse diode D2 is arranged behind the DC/DC converter, and the reverse diode D2 is mainly used for protecting the DC/DC converter from being damaged by voltage of a galvanic pile when the voltage of the galvanic pile is high and K1 and K2 do not work according to normal logic.
The embodiment of the present application provides a control method of a high voltage system, which is applied to a fuel cell vehicle controller in the high voltage system, where a stack in the high voltage system is connected to a high voltage component in the high voltage system, and as shown in fig. 2, the control method may include:
s201, when a power-on command is received, controlling the voltage converter to supply power to the target part.
It should be noted that, in the starting process of the fuel cell engine, when receiving a power-on command, the FCU (fuel cell vehicle controller) controls the 24V boost DC/DC converter to start, and supplies power to target components by using the voltage converter, where the target components are high-voltage components such as an air compressor, a hydrogen circulation pump, an electric water pump, and a PTC heater.
Optionally, in another embodiment of the present application, an implementation manner of step S201, as shown in fig. 3, may include:
s301, when a power-on command is received, detecting whether a voltage converter is normal;
it should be noted that, during the starting process of the fuel cell engine, when a power-on command is received, it is first detected whether the 24V boost DC/DC converter can operate normally. If normal, the 24V boost DC/DC converter can be used normally to supply power to various high-voltage components. If not, it is necessary to stop the operation of the 24V step-up DC/DC converter for supplying power to the respective high-voltage components.
And S302, if the voltage converter is detected to be normal, starting the voltage converter.
And S303, controlling the voltage converter to pre-charge the target part.
In addition, referring to fig. 1, after the 24V step-up DC/DC converter is started and the output of the 24V step-up DC/DC converter is stabilized, the FCU controls the K1 and K3 contactors to be closed, and the 24V step-up DC/DC converter is used to pre-charge high-pressure components such as an air compressor, a hydrogen circulation pump, an electric water pump, and a PTC heater.
And S304, detecting whether the target part is precharged.
And S305, controlling the voltage converter to supply power to the target component when the completion of the pre-charging of the target component is detected.
In addition, referring to fig. 1, if it is detected that the target component is precharged completely, the FCU controls K4 to be closed, and after T1 time, K3 is turned off, and the target component is powered by the 24V boost DC/DC converter, where the T1 time may be set according to actual conditions.
S202, detecting whether the voltage of the galvanic pile is larger than the voltage of the voltage converter.
It should be noted that, after the voltage converter is controlled to supply power to the target component, the target component may operate according to a starting condition, and at this time, the stack may generate an electric energy output under the condition of air and hydrogen. The FCU then detects the voltage of the stack and the voltage of the voltage converter in real time using the voltage detection device to determine whether the voltage of the stack is greater than the voltage of the voltage converter.
And S203, stopping the power supply of the voltage converter to the target part and switching the electric pile to supply power to the target part when the voltage of the electric pile is detected to be larger than the voltage of the voltage converter.
In addition, referring to fig. 1, if it is detected that the voltage of the cell stack is greater than the voltage of the voltage converter, K4 is turned off, the voltage converter stops supplying power to the target component, K2 is turned on after T2 time, and K1 is turned off after T3 time, and the cell stack is switched to supply power to the target component, wherein T2 and T3 can be set according to actual conditions. The voltage of the galvanic pile will gradually increase the voltage of the power supply bus, thereby avoiding the sudden high-voltage access of each high-voltage part and also avoiding the problem that the galvanic pile generates high potential after gas is introduced. And each high-voltage part directly gets electricity from the galvanic pile in the galvanic pile working process, so that the problem of low conversion efficiency in the voltage conversion process is avoided.
Optionally, in another embodiment of the application, before the step S203 of stopping the power supply of the target component by the voltage converter and switching the cell stack to supply the power to the target component is executed, the method may further include:
the stability of the voltage output of the stack is detected.
When it is detected that the voltage of the cell stack is greater than the voltage of the voltage converter, the voltage detection device detects the stability of the voltage output of the cell stack. After the voltage output of the electric pile is determined to be stable, the voltage converter is stopped to supply power to the target part, and the electric pile is switched to supply power to the target part.
And S204, when a power-off command is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode.
It should be noted that, with reference to fig. 1, in the shutdown process of the fuel cell engine, when a power-off command is received, the FCU starts the 24V boost DC/DC converter, and after the output of the 24V boost DC/DC voltage is stable, the FCU controls each high-voltage component to operate according to the shutdown condition. And the FCU controls the K1 to pull in, after T4 time, the K2 is disconnected, and the cell stack is controlled to enter a discharging mode to discharge. T4 may be set according to actual conditions.
S205, detecting whether the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value.
It should be noted that, the FCU detects the voltage of the stack and the voltage of the voltage converter through the voltage detection device, calculates the difference between the voltage of the stack and the voltage of the voltage converter, and determines whether the difference between the voltage of the stack and the voltage of the voltage converter is smaller than a preset threshold, which may be set according to actual conditions, for example, 1V.
And S206, if the difference value between the voltage of the galvanic pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop.
It should be noted that, with reference to fig. 1, if the difference between the voltage of the cell stack and the voltage of the voltage converter is detected to be smaller than the preset threshold, it is indicated that the voltage of the cell stack and the voltage of the voltage converter are already close to each other at this time, K4 is controlled to pull in, after T5 time, K1 is turned off, the voltage converter is switched to supply power, and each high-voltage component is controlled to stop. T5 may be set according to actual conditions.
Optionally, in another embodiment of the present application, an implementation manner of step S206 may include:
and if the difference value between the voltage of the galvanic pile and the voltage of the voltage converter is smaller than a preset threshold value, acquiring the current state of the target part.
And judging whether the current state of the target part meets the condition of entering the shutdown state or not.
And if the current state of the target part is judged to be in accordance with the condition of entering the shutdown state, controlling the target part to be shut down.
It should be noted that, if it is detected that the difference between the voltage of the stack and the voltage of the voltage converter is smaller than the preset threshold, the current state of the target component is obtained. And then judging whether the current state of the target part meets the condition of entering the shutdown state or not according to the current state of the target part, and controlling the target part to be shut down if the current state of the target part meets the condition of entering the shutdown state.
And S207, when the discharge of the galvanic pile is finished, controlling the voltage converter to stop.
After each high-voltage component is stopped, the discharge state of the galvanic pile is detected, and when the discharge of the galvanic pile is completed, the voltage converter is controlled to stop, and the high-voltage system of the transmitter is powered off.
According to the control method of the high-voltage system, when a power-on command is received, the voltage converter is controlled to supply power to a target part. And then detecting whether the voltage of the stack is greater than the voltage of the voltage converter. And if the voltage of the electric pile is detected to be larger than the voltage of the voltage converter, stopping the power supply of the voltage converter to the target part, and switching the electric pile to supply power to the target part. And when a power-off command is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode. And detecting whether the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value. And if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop. And when the discharge of the galvanic pile is finished, controlling the voltage converter to stop. Therefore, by using the method, the electric pile can be used for directly supplying power to the high-voltage parts, the electric energy conversion process of the electric pile is reduced, and the energy utilization efficiency is greatly improved. Meanwhile, the high-voltage parts of the fuel cell engine are controlled by two power supplies, so that the normal stop of the fuel cell engine can be ensured under the condition of the failure of the whole vehicle high-voltage system. The problem of low energy utilization ratio of the whole high-voltage system caused by low working efficiency of the DC/DC converter of the fuel cell engine in the technology is solved.
In another embodiment of the present application, a control device of a high voltage system is further disclosed, as shown in fig. 4, including:
and a power supply unit 401, configured to control the voltage converter to supply power to the target component when the power-on instruction is received.
A first detecting unit 402 for detecting whether the voltage of the stack is greater than the voltage of the voltage converter.
And a switching unit 403 configured to stop the voltage converter from supplying power to the target component and switch the stack from supplying power to the target component when it is detected that the voltage of the stack is greater than the voltage of the voltage converter.
And the first control unit 404 is configured to, when a power-off command is received, control the target component to enter a shutdown condition, and control the stack to enter a discharge mode.
A second detecting unit 405, configured to detect whether a difference between the voltage of the stack and the voltage of the voltage converter is smaller than a preset threshold.
And a second control unit 406, configured to control the target component to stop if it is detected that a difference between the voltage of the stack and the voltage of the voltage converter is smaller than a preset threshold.
And a third control unit 407, configured to control the voltage converter to stop when the discharge of the stack is completed.
In this embodiment, specific implementation processes of the power supply unit 401, the first detection unit 402, the switching unit 403, the first control unit 404, the second detection unit 405, the second control unit 406, and the third control unit 407 may refer to the contents of the method embodiment corresponding to fig. 2, and are not described herein again.
In the control device of the high voltage system provided by the present application, when receiving a power-on command, the power supply unit 401 controls the voltage converter to supply power to the target component. The first detection unit 402 then detects whether the voltage of the stack is greater than the voltage of the voltage converter. When detecting that the voltage of the stack is greater than the voltage of the voltage converter, the switching unit 403 stops the voltage converter from supplying power to the target component, and switches the stack to supply power to the target component. When a power-off command is received, the first control unit 404 controls the target component to enter a shutdown condition and controls the stack to enter a discharge mode. The second detection unit 405 detects whether a difference between the voltage of the stack and the voltage of the voltage converter is less than a preset threshold. If the difference between the voltage of the stack and the voltage of the voltage converter is smaller than the preset threshold, the second control unit 406 controls the target component to stop. When the discharge of the stack is completed, the third control unit 407 controls the voltage converter to stop. Therefore, by using the method, the electric pile can be used for directly supplying power to the high-voltage parts, the electric energy conversion process of the electric pile is reduced, and the energy utilization efficiency is greatly improved. Meanwhile, the high-voltage parts of the fuel cell engine are controlled by two power supplies, so that the normal stop of the fuel cell engine can be ensured under the condition of the failure of the whole vehicle high-voltage system. The problem of low energy utilization ratio of the whole high-voltage system caused by low working efficiency of the DC/DC converter of the fuel cell engine in the technology is solved.
Optionally, in another embodiment of the present application, an implementation manner of the power supply unit 401 includes:
and the first detection subunit is used for detecting whether the voltage converter is normal or not.
And a start-up unit for starting up the voltage converter when the voltage converter is detected to be normal.
And the first control subunit is used for controlling the voltage converter to pre-charge the target part.
And the second detection subunit is used for detecting whether the pre-charging of the target part is finished.
And the second control subunit is used for controlling the voltage converter to supply power to the target part if the completion of the pre-charging of the target part is detected.
In this embodiment, specific implementation processes of the first detecting subunit, the promoter unit, the first control subunit, the second detecting subunit and the second control subunit may refer to the content of the method embodiment corresponding to fig. 3, and are not described herein again.
Optionally, in another embodiment of the present application, the control device of the high-voltage system may further include:
and the third detection unit is used for detecting the stability of the voltage output of the electric pile.
In this embodiment, for the specific execution process of the third detection unit, reference may be made to the contents of the above method embodiments, and details are not described here.
Optionally, in another embodiment of the present application, an implementation manner of the second control unit 406 includes:
and the obtaining subunit is used for obtaining the current state of the target part if the difference value between the voltage of the galvanic pile and the voltage of the voltage converter is smaller than a preset threshold value.
And the judging subunit is used for judging whether the current state of the target part meets the condition of entering the shutdown state.
And the third control subunit is used for controlling the target part to stop if the current state of the target part is judged to meet the condition of entering the stop state.
In this embodiment, for the specific execution processes of the obtaining subunit, the determining subunit, and the third controlling subunit, reference may be made to the contents of the above method embodiments, and details are not described here.
Another embodiment of the present application further provides an electronic device, as shown in fig. 5, specifically including:
one or more processors 501.
A storage device 502 on which one or more programs are stored.
The one or more programs, when executed by the one or more processors 501, cause the one or more processors 501 to implement the method of any of the embodiments described above.
Another embodiment of the present application further provides a computer storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method according to any one of the above embodiments.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control method of a high-voltage system is applied to a fuel cell automobile controller in the high-voltage system, wherein a stack in the high-voltage system is connected with a high-voltage part in the high-voltage system, and the method comprises the following steps:
when a power-on instruction is received, the voltage converter is controlled to supply power to the target part;
detecting whether the voltage of the electric pile is greater than the voltage of the voltage converter;
if the voltage of the electric pile is detected to be larger than the voltage of the voltage converter, stopping the voltage converter from supplying power to the target part, and switching the electric pile to supply power to the target part;
when a power-off instruction is received, controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode;
detecting whether the difference value of the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value or not;
if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, controlling the target part to stop;
and when the discharge of the galvanic pile is finished, controlling the voltage converter to stop.
2. The method of claim 1, wherein controlling the voltage converter to power the target component comprises:
detecting whether the voltage converter is normal;
if the voltage converter is detected to be normal, starting the voltage converter;
controlling the voltage converter to pre-charge the target component;
detecting whether the target part is pre-charged;
and if the target part is detected to be precharged, controlling the voltage converter to supply power to the target part.
3. The method of claim 1, wherein before stopping the voltage converter from supplying power to the target component and switching the stack to supply power to the target component, further comprising:
and detecting the stability of the voltage output of the galvanic pile.
4. The method according to claim 1, wherein the controlling the target component to complete shutdown if the difference between the voltage of the stack and the voltage of the voltage converter is detected to be less than a preset threshold value comprises:
if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value, acquiring the current state of the target part;
judging whether the current state of the target part meets the condition of entering a shutdown state or not;
and if the current state of the target part is judged to be in accordance with the condition of entering the shutdown state, controlling the target part to be shut down.
5. A control device for a high-pressure system, comprising:
the power supply unit is used for controlling the voltage converter to supply power to the target part when receiving a power-on instruction;
a first detection unit for detecting whether a voltage of the stack is greater than a voltage of the voltage converter;
a switching unit configured to stop the voltage converter from supplying power to the target component and switch the cell stack to supply power to the target component if it is detected that the voltage of the cell stack is greater than the voltage of the voltage converter;
the first control unit is used for controlling the target part to enter a shutdown working condition and controlling the galvanic pile to enter a discharge mode when a power-off instruction is received;
a second detection unit for detecting whether a difference between the voltage of the stack and the voltage of the voltage converter is less than a preset threshold;
the second control unit is used for controlling the target part to stop if the difference value between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold value;
and the third control unit is used for controlling the voltage converter to stop when the discharge of the galvanic pile is finished.
6. The apparatus of claim 5, wherein the power supply unit comprises:
the first detection subunit is used for detecting whether the voltage converter is normal or not;
a start-up unit for starting up the voltage converter if it is detected that the voltage converter is normal;
the first control subunit is used for controlling the voltage converter to pre-charge the target part;
the second detection subunit is used for detecting whether the target part is precharged;
and the second control subunit is used for controlling the voltage converter to supply power to the target part if the target part is detected to be precharged.
7. The apparatus of claim 5, further comprising:
and the third detection unit is used for detecting the stability of the voltage output of the galvanic pile.
8. The apparatus of claim 5, wherein the second control unit comprises:
the obtaining subunit is configured to obtain a current state of the target component if it is detected that a difference between the voltage of the electric pile and the voltage of the voltage converter is smaller than a preset threshold;
the judging subunit is used for judging whether the current state of the target part meets the condition of entering a shutdown state;
and the third control subunit is used for controlling the target part to stop if the current state of the target part is judged to meet the condition of entering the stop state.
9. An electronic device, comprising:
one or more processors;
a storage device having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-4.
10. A computer storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method of any of claims 1 to 4.
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| CN113246802B (en) | 2021-11-19 |
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